CN101485009B - Method of making battery using as case with aluminium multilayered films - Google Patents

Method of making battery using as case with aluminium multilayered films Download PDF

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Publication number
CN101485009B
CN101485009B CN 200780025099 CN200780025099A CN101485009B CN 101485009 B CN101485009 B CN 101485009B CN 200780025099 CN200780025099 CN 200780025099 CN 200780025099 A CN200780025099 A CN 200780025099A CN 101485009 B CN101485009 B CN 101485009B
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CN
China
Prior art keywords
satchel
described
battery
electrode assemblie
method
Prior art date
Application number
CN 200780025099
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Chinese (zh)
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CN101485009A (en
Inventor
柳时喆
李钟龙
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Bps株式会社
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Priority to KR1020060066349 priority Critical
Priority to KR10-2006-0066349 priority
Priority to KR20060066349 priority
Priority to KR1020070005225 priority
Priority to KR20070005225A priority patent/KR100800375B1/en
Priority to KR10-2007-0005225 priority
Application filed by Bps株式会社 filed Critical Bps株式会社
Priority to PCT/KR2007/003135 priority patent/WO2008007867A1/en
Publication of CN101485009A publication Critical patent/CN101485009A/en
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Publication of CN101485009B publication Critical patent/CN101485009B/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/0277Insulating material
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0431Cells with wound or folded electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/0275Cases, jackets or wrappings characterised by the material of flexible envelopes or bags around open cell elements
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/0285Conductive material
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/06Arrangements for introducing electric connectors into or through cases
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/08Sealing materials
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0587Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/0287Cases, jackets or wrappings characterised by the material comprising layers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49108Electric battery cell making
    • Y10T29/4911Electric battery cell making including sealing

Abstract

A method of manufacturing a cell using a pouch of aluminum multilayered film is disclosed. The pouch of an aluminum multilayered film is used as the outer case of the cell. The method includes: inserting an electrode assembly, which is composed of a negative electrode, separator, and positive electrode, in the pouch; sealing the electrode assembly; and bending the sealed portion of the cell once or twice. Therefore, the present invention can enhance the safety and energy density of the cell.

Description

Aluminium multilayered films is made the method for battery as shell

Technical field

The present invention relates to make the method for battery, relate more specifically to aluminium multilayered films is made as shell the method for battery, described method is made battery case with the satchel of aluminium multilayered films, in the satchel shell, insert the electrode assemblie of forming by positive pole, dividing plate and negative pole, seal this shell, and once or twice, thereby strengthen the fail safe and the energy density of battery with the hermetic unit bending of battery.

Background technology

Usually, battery is divided into primary cell and rechargeable battery.The primary cell major part is made into cylindrical, and rechargeable battery is made into cylindrical or prismatic.Prismatic battery adopts the satchel of metal cylinder or aluminium multilayered films as its shell.

Metal cartridge type cylindrical battery and prismatic battery are all by making with metal-back and cap assemblies assembling.Metal-back is made with stainless steel or aluminium.

The following manufacturing of cylindrical battery: after coiled electrode assemblies or bar electrode assembly that manufacturing positive pole, dividing plate and negative pole are reeled, electrode assemblie is put into cylindrical tube, then to wherein injecting electrolyte.To be connected on cap assemblies and the cylindrical tube with the anodal terminal that is connected with negative pole or is connected with rod.And, carry out crimping and creep so that tightly connection cover assembly and cylindrical tube.

The following manufacturing of prismatic battery: after coiled electrode assemblies or stack electrode assemblie that manufacturing positive pole, dividing plate and negative pole are reeled, electrode assemblie is put into prismatic tube then terminal is connected on the cap assemblies.Afterwards, to wherein injecting electrolyte, then tube is sealed.

Especially, conventional cylindrical and inferior position square lithium base secondary cell is that they are to make by the technology of complexity, because be soldered on the cylindrical tube with anodal cap assemblies and the terminal that is connected with negative pole, or the like.And because its fault and unexpected explosion time, metal-back may be abnormally dangerous to the user when battery.

In addition, the conventional method of manufacturing battery has following problem: the area of tube weight and cap assemblies need be sacrificed the energy density of Unit Weight and volume.For example, bag shape prismatic secondary cell is made by this way: after making the coiled electrode assemblies or stack electrode assemblie that anodal, dividing plate and negative pole reeled, electrode assemblie put into by dipping lift the prismatic grooves that (dip drawing) forms at bag shape shell.Afterwards, inject the electrolyte in bag shape shell.With terminal and the hot melt vacuum seal of bag shape shell.Yet because the hermetic unit and the terminal of bag shape shell occupy certain area in the prismatic battery of manufacturing, it has reduced energy density.

In addition, conventional method seldom is used for the battery of other type except prismatic.And, must carry out vacuum seal so that apply certain pressure to electrode assemblie.In addition, owing to must lift the formation groove by dipping, described dipping lifts and need apply predetermined pressure to shell, thus must the constant shell of used thickness in order to avoid tear, and lift the degree of depth at dipping and be difficult to form groove deeply the time, this is the shortcoming of conventional method.

Simultaneously, korean patent application No.10-2004-0083654 discloses following suggestion, and wherein oval and cylindrical battery can lift by the satchel manufacturing by dipping.Yet, to flood under the state that lifts and form because groove must be subjected to constant compression force at shell, there is the problem that must use thicker satchel in this suggestion.And, lifting the degree of depth when dark at dipping, this suggestion still is difficult to form groove.

Summary of the invention

Technical problem

Therefore, propose the present invention according to above problem, and the purpose of this invention is to provide the simple manufacture method of the battery of energy density and fail safe enhancing, wherein the satchel of aluminium multilayered films is used as battery case.

Technical scheme

According to an aspect of the present invention, above and other purpose can use the manufacture method of the battery of aluminium multilayered films to realize by shell is provided.This method comprises: the electrode assemblie that preparation is reeled with electrode and carrier ring, and described electrode assemblie is made up of positive pole, negative pole and the dividing plate between positive pole and negative pole; In electrode assemblie, inject electrolyte; And sealing is injected into the electrode assemblie of electrolyte.

Here, the enclosed electrode assembly comprises: with the wrapped end part of satchel parcel electrode assemblie and heat bonding satchel; Will from a side of electrode assemblie or from two side-prominent terminals, on the terminal both sides adhesive polymer of hot melt with satchel heat bonding simultaneously be in the same place, and seal them; And with twice of the hermetic unit bending of terminal and satchel.

And the enclosed electrode assembly can comprise puts into previously prepared cylindrical or oval satchel tube with electrode assemblie.

Satchel is meant aluminium multilayered films.

Preferably, satchel forms like this: the side coating of aluminium lamination is formed adhesive layer, and the opposite side of aluminium lamination is owing to coated single or multiple lift insulating material forms insulating barrier.

Preferably, adhesive layer is selected from polyolefin group, polyimides (PI), polyvinyl chloride (PVC), polyvinylidene fluoride (PVDF), polyvinyl alcohol (PVA) and poly(ethylene oxide) (PEO), or the compound that mixes with two or more materials that are selected from these.

Preferably, insulating barrier is selected from polyethylene terephthalate (PET) and nylon, or the compound that mixes with them.

Adhesive layer and insulating barrier can be formed by different component according to battery types.Therefore, the component of adhesive layer and insulating barrier can not be limited to component listed above.

Beneficial effect

Because method of the present invention can be made the cylindrical and prismatic battery that shell uses satchel, so can simplify its manufacturing process and increase its energy density.And fail safe and cost benefit have also increased.Therefore, shell uses the conventional batteries of metal cylinder to be used the battery of satchel to replace by shell.

The accompanying drawing summary

Can more be expressly understood above and other purpose of the present invention, feature and other advantage by the following detailed description that combines with accompanying drawing, wherein:

Fig. 1 a is the explanation perspective view that comprises the cylindrical electrode assembly of axle of the present invention;

Fig. 1 b is the perspective view of explanation prismatic coiled electrode assemblies of the present invention;

Fig. 1 c is the perspective view of explanation prismatic stack electrode assemblie of the present invention;

Fig. 2 illustrates the procedure of making cylindrical battery according to an embodiment of the present invention by the satchel development method successively;

Fig. 3 illustrates the procedure of making cylindrical battery according to an embodiment of the present invention by the satchel jackknife method successively;

Fig. 4 illustrates the procedure of making cylindrical battery according to another embodiment of the invention by the satchel development method successively;

Fig. 5 illustrates the procedure of making cylindrical battery according to another embodiment of the invention by the satchel jackknife method successively;

Fig. 6 a is the front view that the cylindrical battery that passes through the manufacturing of satchel development method according to an embodiment of the present invention is described;

Fig. 6 b is the front view that the cylindrical battery that passes through the manufacturing of satchel jackknife method according to an embodiment of the present invention is described;

Fig. 7 a is the front view that the cylindrical battery that passes through the manufacturing of satchel development method according to an embodiment of the present invention is described;

Fig. 7 b is the front view that the cylindrical battery that passes through the manufacturing of satchel jackknife method according to an embodiment of the present invention is described;

Fig. 8 a is the rearview that explanation is used to make the satchel of cylindrical battery of the present invention;

Fig. 8 b is the rearview that explanation is used to make the satchel of prismatic battery of the present invention;

Fig. 9 is the cylindrical battery of the two step bending methods according to the present invention or the end view of prismatic battery;

Figure 10 a is the cylindrical battery of Fig. 9 of satchel development method according to the present invention or the front view of prismatic battery;

Figure 10 b is the cylindrical battery of Fig. 9 of satchel jackknife method according to the present invention or the front view of prismatic battery;

Figure 11 is the cylindrical battery of Figure 10 or the front view of prismatic battery, so that describe the last processing (ending process) of battery bend end section;

Figure 12 is the front view of the cylindrical battery of Fig. 6 b of two step bending methods according to the present invention;

Figure 13 is the front view of the cylindrical battery of Fig. 7 b of two step bending methods according to the present invention;

Figure 14 is the voltage-Capacity Plan according to the cylindrical battery of the AAA size of embodiment of the present invention 1 and Comparative Examples 1 manufacturing;

Figure 15 is the cycle life figure according to the cylindrical battery of the AAA size of embodiment of the present invention 1 manufacturing; And

Figure 16 is the cycle life figure according to the prismatic battery of embodiment of the present invention 2 manufacturings.

The concise and to the point description of<reference numeral 〉

1: satchel

2: electrode assemblie

11: satchel twines end parts

12: the satchel expansion

13: the satchel folded part

14: the battery bend end section

21: terminal

22: adhesive polymer

23: sweep

Optimum implementation of the present invention

Now, describe the preferred embodiments of the invention with reference to the accompanying drawings in detail.

Make electrode assemblie

Shown in Fig. 1 a and 1b, electrode assemblie has the takeup type structure that positive pole, dividing plate and negative pole are reeled.In addition, electrode assemblie has the stacked structures shown in Fig. 1 c.

Coiled electrode assemblies 2 shown in Fig. 1 a and 1b is made by this way: around axle 100 rolled electrodes and carrier ring, separate with axle 100 then, thereby form cylindrical.Here, can be at the position at axle 100 places placement positioning pin.

Stack electrode assemblie 2 shown in Fig. 1 c is made by this way: positive pole, dividing plate and negative pole repeatedly pile up continuously.Can form dividing plate with the pieces that is positioned between the electrode (positive pole and negative pole) here.In addition, can form dividing plate and make dividing plate be Z-shaped increase with the conitnuous forms between electrode, or around electrode roll around increase.

Injection and dipping electrolyte

After the preparation electrode assemblie 2, immerse its in electrolyte or inject the electrolyte into wherein.Here, injection electrolyte can carry out after electrode assemblie 2 being put into the cylindrical tube made with satchel or oval tube, and this is description hereinafter.

Sealing

After injection and dipping electrolyte, electrode assemblie 2 is handled shown in Fig. 6 a or 7a by this way: the adhesive polymer 22 that will have insulation and a melting property or is applied on the terminal of the both sides of self-electrode assembly 2 all giving prominence to 21 on a side-prominent terminal 21 that is applied to self-electrode assembly 2 under 50 ℃ to 200 ℃.

Adhesive polymer 22 has strengthened conduct from the bond properties of positive pole to the terminal of the conductor of negative pole conduction.When carrying out below 50 ℃ when bonding, adhesive polymer 22 is bonding illy with terminal 21.But, when carrying out when bonding adhesive polymer 22 fusings and bonding brokenly more than 200 ℃ with terminal 21.Therefore, the bonding of adhesive polymer 22 preferably carried out under 50 ℃ to 200 ℃.

To put into the satchel of making in advance 1 by adhesive polymer 22 bonding electrode assemblies 2.Afterwards, with the terminal 21 and adhesive polymer 22 heat bondings simultaneously under 100 ℃ to 250 ℃ together of satchel 1, electrode assemblie 2, sealing then.

When the heat bonding temperature below 100 ℃ the time, stick portion may separate because of low-heat easily.On the other hand, when the heat bonding temperature more than 250 ℃ the time, satchel 1 or adhesive polymer 22 may melt and can not keep their form.Therefore, the bonding of adhesive polymer 22 preferably carried out under 100 ℃ to 250 ℃.

About the manufacture method of cylindrical or prismatic battery, use encapsulating method and do not relate to bending process, below except:

Cylindrical battery uses the cylindrical satchel shown in Fig. 8 a, and prismatic battery uses the oval satchel shown in Fig. 8 b.Therefore, for convenience of description, encapsulating method can be described according to cylindrical battery.

It below is detailed description according to the encapsulating method of the cylindrical battery shown in Fig. 2 and 3 or 4 and 5.

Shown in Fig. 2 or 3, the satchel 1 of aluminium multilayered films is made into cylindrical.The satchel that uses adhesive to form highlightedly in cylindrical satchel 1 side twines end parts 11 and is bonded to the satchel main body.Electrode assemblie 2 is put into cylindrical satchel 1.Make an end parts or two end parts expansions of the satchel that inserts electrode assemblie 2 form satchel expansion 12 or be folded to form satchel folded part 13.Afterwards, with satchel expansion 12 or 13 heat bondings of satchel folded part both sides with sealed cell.

Shown in Fig. 4 or 5, electrode assemblie 2 is twined by satchel 1.Use adhesive to be coated, it is bonding with the satchel main body to twine end parts 11 by the satchel that heat bonding is formed at satchel 1 side highlightedly.Make an end parts or two end parts expansions of the satchel that inserts electrode assemblie 2 form satchel expansion 12 or be folded to form satchel folded part 13.Afterwards, with satchel expansion 12 or 13 heat bondings of satchel folded part to seal its both sides.

As shown in Figure 8, satchel twines the thermal bond site that end parts 11 is used to show cylindrical satchel, and it is preferably placed at the center of satchel with respect to the heat bonding zone of battery top and bottom.

Satchel 1 is made by the aluminium film of all coated one or more layers jointing materials in both sides (adhesive layer) and insulating material (insulating barrier), and the component of described material is not reacted with electrolyte.

Adhesive layer is selected from polyolefin group, polyimides (PI), polyvinyl chloride (PVC), polyvinylidene fluoride (PVDF), polyvinyl alcohol (PVA) and poly(ethylene oxide) (PEO), or the compound that mixes with two or more materials that are selected from these.

Insulating barrier is selected from polyethylene terephthalate (PET) and nylon, or the compound that mixes with them.

Because adhesive layer and insulating barrier can be formed by different component according to battery types, so the component of adhesive layer and insulating barrier can not be limited to component listed above.

Adhesive polymer 22 is selected from polyolefin group, polyimides (PI), polyvinyl chloride (PVC), polyvinylidene fluoride (PVDF), polyvinyl alcohol (PVA), poly(ethylene oxide) (PEO) and polyethylene terephthalate (PET), or the compound that mixes with two or more materials that are selected from these.Adhesive polymer 22 is used under 50 ℃ to 200 ℃ at the bonding terminal in the one or both sides of electrode assemblie.Have only when material also can not carry out seal bond with the electrolyte reaction, they can be used as adhesive polymer 22.

Seal process can carry out by this way: satchel 1 and adhesive polymer 22 are handled by heat bonding by vacuum seal under 100 ℃ to 250 ℃.

Electrolyte injection process and seal process can carry out (for example, in being full of the glove box of inert gas or in hothouse) in check atmosphere, so if desired atmosphere suppresses moisture.

Jogged terminal end

Shown in Fig. 6 a and 6b or Fig. 7 a and 7b, when forming satchel expansion 12 or satchel folded part 13, when being sealed fully then, the terminal 21 that will stretch out from the one or both sides of battery is bonding with satchel 1.Yet the problem of the stick portion between terminal 21 and the satchel 1 is that they reduce the energy density of battery.For addressing this problem, with the stick portion bending once or twice with crooked machine.

Shown in Fig. 6 a or 7a, form after the satchel expansion 12, by crooked machine with twice of the stick portion bending of battery one or both sides.

Shown in Fig. 6 b or 7b, form after the satchel folded part 13, with the stick portion bending of battery one or both sides once by crooked machine.Therefore, do not have ledge by the battery of making through the formation of satchel folded part 13.

It below is detailed description with reference to the BENDING PROCESS of accompanying drawing.

As shown in Figure 9, at first with the stick portion of battery crooked 90 ° to form sweep 23.The front view of the sweep 23 of battery has been described in Figure 10 a and 10b.

Shown in Figure 10 a, when forming the satchel expansion and during with crooked 90 ° of stick portion, thus the outwards outstanding energy densities that reduce of battery bend end section 14.For addressing this problem, with crooked 180 ° of the outwards outstanding battery bend end section 14 edge directions of arrow as shown in figure 11.

On the contrary, when forming satchel folded part 13, battery does not have ledge, shown in Figure 10 b.Under the sort of situation, once with this part bending of battery.

In addition, with strong adhesive with the satchel 1 of bending with comprise that the sweep 23 of terminal 21 tightly adheres to battery main body.

As mentioned above, can solve the problem that the energy density that caused by crooked stick portion reduces.Though bending process is effectively, consider the connection relevant with other device, it is omissible.And when satchel folded part 13 formed, this part only was bent once to make battery.Yet, when satchel folded part 13 is made long so that when making, can be with twice of this part bending shown in Figure 12 and 13.

By following embodiment 1 and Comparative Examples 1, the present invention can become and be more readily understood.

Embodiment 1: make the column lithium ion battery that shell uses satchel

Positive pole is made by this way: positive electrode active materials uses graphite, and anodal substrate uses Copper Foil.Negative pole is made by this way: negative active core-shell material uses lithium and cobalt oxides LiCoO 2, the negative pole substrate uses aluminium foil.In addition, dividing plate uses polyethylene (PE) perforated membrane.These positive poles, negative pole and dividing plate are reeled around the axle of coiler device.The independent terminal heat bonding that under 130 ℃, will give prominence to from the top and/or the bottom of anodal and negative pole respectively as adhesive polymer, thereby preparation electrode assemblie with polyacrylic polymer.

Electrode assemblie is immersed electrolyte (1M LiPF 6In EC/DEC (50: 50v%)), reel so that to its cohesive terminus part with the satchel film down at 180 ℃ then, thereby make the cylindrical tube that comprises electrode assemblie.With terminal and the satchel heat bonding with both sides under 180 ℃ of polyacrylic adhesive polymer, seal then, thus the battery of manufacturing AAA size (10.5 * 44.5).

Current changing rate based on 0.2C charges and discharge test to the battery that seals.As shown in figure 14, the result shows that its capacity is 510mAh, and its energy density is higher, as 540Wh/l and 208Wh/kg.In addition, Figure 15 shows its cycle life figure based on charging of the current changing rate of 1C and discharge the time.

Embodiment 2: make the square lithium ion battery that shell uses satchel

As the method for implementing scheme 1 prepares prismatic electrode assemblie.

Prismatic electrode assemblie is immersed electrolyte (1M LiPF 6In EC/DEC (50: 50v%)), reel so that to its cohesive terminus part with the satchel film down at 180 ℃ then, thereby make the oval tube that comprises electrode assemblie.With terminal and the satchel heat bonding with both sides under 180 ℃ of polyacrylic adhesive polymer, seal then, thereby make certain size (5.2 (T, mm) * 34 (W, mm) * 50 batteries of (L, mm)).

Battery to sealing charges and discharge test.The result shows that its capacity is 1,050mAh, and also its energy density is higher, as 440Wh/l and 215Wh/kg.Simultaneously, Figure 16 shows the cycle life figure that it circulates up to 100 times when the current changing rate based on 1C charges and discharges.

Comparative Examples 1: make shell and use stainless column lithium ion battery

As the method for implementing scheme 1 prepares electrode assemblie.

Electrode assemblie is put into AAA stainless steel cylindrical tube.Afterwards, with electrolyte (1MLiPF 6Pour in the tube in EC/DEC (50: 50v%)).Then, with each terminal of top and bottom and lid and cylindrical tube welding.Then, cylindrical battery is sealed and crimping and creep, thus the cylindrical battery of manufacturing AAA size (10.5 * 44.5).

Current changing rate based on 0.2C charges and discharge test to using stainless cylindrical battery.As shown in figure 14, the result shows that its capacity is 420mAh, and its energy density is 403Wh/l and 160Wk/kg.

Therefore, and compare by the conventional batteries of metal shell manufacturing, that method of the present invention can be used is thinner than metal cylinder, than metal cylinder light and also not and the satchel of the corresponding part of lid make battery, thereby increase the energy density of every volume and every weight.

Although disclose the preferred embodiments of the invention for illustrative purposes, skilled person in the art will appreciate that and to make multiple modification, increase and replacement and do not depart from as disclosed scope and spirit of the present invention in the claims.

Industrial applicibility

As mentioned above, because method of the present invention is made battery case with satchel, it can simplify battery manufacturing process, increases energy density, and therefore increases security. On the contrary, method of the present invention can reduce manufacturing cost. Therefore, shell uses the conventional batteries of metal cylinder to be used the battery of satchel to replace by shell.

Claims (3)

1. make the method that shell uses the battery of aluminium multilayered films, described method comprises:
Preparation is by the electrode assemblie (2) of electrode and carrier ring coiling, and described electrode assemblie (2) is made up of positive pole, negative pole and the dividing plate between described positive pole and described negative pole;
Inject the electrolyte in the described electrode assemblie (2); And
Sealing is injected into the described electrode assemblie (2) of described electrolyte,
Wherein enclosed electrode assembly (2) comprising:
The thing (1) that is packed in bag twines described electrode assemblie (2) and with the winding end parts heat bonding of described satchel (1), or described electrode assemblie (2) put into previously prepared cylindrical or oval satchel tube, wherein said satchel (1) forms by this way: the side coating of described aluminium lamination is formed adhesive layer, and the opposite side of described aluminium lamination is owing to coated single or multiple lift insulating material forms insulating barrier;
Will be from the one or both sides of described electrode assemblie (2) outstanding terminal (21), the adhesive polymer (22) of hot melt and described satchel (1) while heat bonding and seal them together on the terminal both sides; And
With twice of the hermetic unit bending of terminal (21) and satchel.
2. the method for claim 1, wherein said adhesive layer is selected from polyolefin group, polyimides (PI), polyvinyl chloride (PVC), polyvinylidene fluoride (PVDF), polyvinyl alcohol (PVA) and poly(ethylene oxide) (PEO), or mixes two or more to be selected from these material and the mixture that obtains.
3. the method for claim 1, wherein said insulating barrier is selected from polyethylene terephthalate (PET) and nylon, or mixes the mixture that they obtain.
CN 200780025099 2006-07-14 2007-06-28 Method of making battery using as case with aluminium multilayered films CN101485009B (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
KR1020060066349 2006-07-14
KR10-2006-0066349 2006-07-14
KR20060066349 2006-07-14
KR10-2007-0005225 2007-01-17
KR1020070005225 2007-01-17
KR20070005225A KR100800375B1 (en) 2006-07-14 2007-01-17 Method of making battery using as case with aluminium multilayered film
PCT/KR2007/003135 WO2008007867A1 (en) 2006-07-14 2007-06-28 Method of making battery using as case with aluminium multilayered films

Publications (2)

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CN101485009A CN101485009A (en) 2009-07-15
CN101485009B true CN101485009B (en) 2011-05-18

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US (1) US20090165290A1 (en)
JP (1) JP2009543289A (en)
KR (1) KR100800375B1 (en)
CN (1) CN101485009B (en)
GB (1) GB2453296B (en)
WO (1) WO2008007867A1 (en)

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